我尝试了this教程将缩放效果放在我的ImageView上，但是当我编译它时，它总是不会缩放。
答案 0 :(得分：0)
您想要缩放样式吗？
使用anyname
在animator文件夹中粘贴以下代码 <set xmlns:android="http://schemas.android.com/apk/res/android" >
<objectAnimator
android:duration="1000"
android:interpolator="@android:interpolator/accelerate_decelerate"
android:propertyName="scaleY"
android:valueFrom="1"
android:valueTo="1.5"
android:repeatCount="infinite"
android:repeatMode="reverse"
/>
<objectAnimator
android:duration="1000"
android:interpolator="@android:interpolator/accelerate_decelerate"
android:propertyName="scaleX"
android:valueFrom="1"
android:valueTo="1.5"
android:repeatCount="infinite"
android:repeatMode="reverse"
/>
</set>
在您的活动中
Animator animation = AnimatorInflater.loadAnimator(getApplicationContext(), R.animator.selectzoom);//select zoom is the file name of your animator xml file
animation.setTarget(imageView);
animation.start();
尝试一次，希望它能起作用
答案 1 :(得分：0)
首先创建一个ZoomInZoomOut课程：
import android.app.Activity;
import android.graphics.Matrix;
import android.graphics.PointF;
import android.os.Bundle;
import android.util.FloatMath;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.ImageView;
public class ZoomInZoomOut extends Activity implements OnTouchListener
{
private static final String TAG = "Touch";
@SuppressWarnings("unused")
private static final float MIN_ZOOM = 1f,MAX_ZOOM = 1f;
// These matrices will be used to scale points of the image
Matrix matrix = new Matrix();
Matrix savedMatrix = new Matrix();
// The 3 states (events) which the user is trying to perform
static final int NONE = 0;
static final int DRAG = 1;
static final int ZOOM = 2;
int mode = NONE;
// these PointF objects are used to record the point(s) the user is touching
PointF start = new PointF();
PointF mid = new PointF();
float oldDist = 1f;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ImageView view = (ImageView) findViewById(R.id.imageView);
view.setOnTouchListener(this);
}
@Override
public boolean onTouch(View v, MotionEvent event)
{
ImageView view = (ImageView) v;
view.setScaleType(ImageView.ScaleType.MATRIX);
float scale;
dumpEvent(event);
// Handle touch events here...
switch (event.getAction() & MotionEvent.ACTION_MASK)
{
case MotionEvent.ACTION_DOWN: // first finger down only
savedMatrix.set(matrix);
start.set(event.getX(), event.getY());
Log.d(TAG, "mode=DRAG"); // write to LogCat
mode = DRAG;
break;
case MotionEvent.ACTION_UP: // first finger lifted
case MotionEvent.ACTION_POINTER_UP: // second finger lifted
mode = NONE;
Log.d(TAG, "mode=NONE");
break;
case MotionEvent.ACTION_POINTER_DOWN: // first and second finger down
oldDist = spacing(event);
Log.d(TAG, "oldDist=" + oldDist);
if (oldDist > 5f) {
savedMatrix.set(matrix);
midPoint(mid, event);
mode = ZOOM;
Log.d(TAG, "mode=ZOOM");
}
break;
case MotionEvent.ACTION_MOVE:
if (mode == DRAG)
{
matrix.set(savedMatrix);
matrix.postTranslate(event.getX() - start.x, event.getY() - start.y); // create the transformation in the matrix of points
}
else if (mode == ZOOM)
{
// pinch zooming
float newDist = spacing(event);
Log.d(TAG, "newDist=" + newDist);
if (newDist > 5f)
{
matrix.set(savedMatrix);
scale = newDist / oldDist; // setting the scaling of the
// matrix...if scale > 1 means
// zoom in...if scale < 1 means
// zoom out
matrix.postScale(scale, scale, mid.x, mid.y);
}
}
break;
}
view.setImageMatrix(matrix); // display the transformation on screen
return true; // indicate event was handled
}
/*
* --------------------------------------------------------------------------
* Method: spacing Parameters: MotionEvent Returns: float Description:
* checks the spacing between the two fingers on touch
* ----------------------------------------------------
*/
private float spacing(MotionEvent event)
{
float x = event.getX(0) - event.getX(1);
float y = event.getY(0) - event.getY(1);
return FloatMath.sqrt(x * x + y * y);
}
/*
* --------------------------------------------------------------------------
* Method: midPoint Parameters: PointF object, MotionEvent Returns: void
* Description: calculates the midpoint between the two fingers
* ------------------------------------------------------------
*/
private void midPoint(PointF point, MotionEvent event)
{
float x = event.getX(0) + event.getX(1);
float y = event.getY(0) + event.getY(1);
point.set(x / 2, y / 2);
}
/** Show an event in the LogCat view, for debugging */
private void dumpEvent(MotionEvent event)
{
String names[] = { "DOWN", "UP", "MOVE", "CANCEL", "OUTSIDE","POINTER_DOWN", "POINTER_UP", "7?", "8?", "9?" };
StringBuilder sb = new StringBuilder();
int action = event.getAction();
int actionCode = action & MotionEvent.ACTION_MASK;
sb.append("event ACTION_").append(names[actionCode]);
if (actionCode == MotionEvent.ACTION_POINTER_DOWN || actionCode == MotionEvent.ACTION_POINTER_UP)
{
sb.append("(pid ").append(action >> MotionEvent.ACTION_POINTER_ID_SHIFT);
sb.append(")");
}
sb.append("[");
for (int i = 0; i < event.getPointerCount(); i++)
{
sb.append("#").append(i);
sb.append("(pid ").append(event.getPointerId(i));
sb.append(")=").append((int) event.getX(i));
sb.append(",").append((int) event.getY(i));
if (i + 1 < event.getPointerCount())
sb.append(";");
}
sb.append("]");
Log.d("Touch Events ---------", sb.toString());
}
}
在view：
XML这样的内容
<com.abc.ZoomInZoomOut
android:id="@+id/image"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
答案 2 :(得分：0)
google this package name
package="it.sephiroth.android.library.imagezoom"
然后导入库并在项目中创建一个类
<强>进口
import it.sephiroth.android.library.imagezoom.ImageViewTouch;
import it.sephiroth.android.library.imagezoom.ImageViewTouch.OnImageViewTouchDoubleTapListener;
import it.sephiroth.android.library.imagezoom.ImageViewTouch.OnImageViewTouchSingleTapListener;
import it.sephiroth.android.library.imagezoom.ImageViewTouchBase.DisplayType;
import it.sephiroth.android.library.imagezoom.ImageViewTouchBase.OnDrawableChangeListener;
ZoomActivity Class
public class ImageZoomActivity extends Activity {
private static final String LOG_TAG = "image-test";
HorizontalListView listview1;
ImageViewTouch mImage;
Button mButton1;
Button mButton2;
CheckBox mCheckBox;
ArrayList<ImageListModel> arryNew = new ArrayList<ImageListModel>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.zoom_in_layout);
arryNew = (ArrayList<ImageListModel>) getIntent().getSerializableExtra("xyz");
System.out.println("size of array "+arryNew.size());
/*if(arryNew.size() > 0)
{
selectRandomImage(arryNew.get(0));
}*/
if(arryNew == null)
{
}
else
{
//mImage.setImageResource(arryNew.get(0));
Picasso.with(this).load(arryNew.get(0).getJpg())
.placeholder(R.drawable.appicon).into(mImage);
}
listview1 = (HorizontalListView)findViewById(R.id.listview1);
listview1.setOnTouchListener(new OnTouchListener() {
float rawX;
int mTouchSlop = ViewConfiguration.get(getApplicationContext())
.getScaledTouchSlop();
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getActionMasked()) {
case MotionEvent.ACTION_DOWN:
v.getParent().requestDisallowInterceptTouchEvent(true);
rawX = event.getRawX();
break;
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP:
v.getParent().requestDisallowInterceptTouchEvent(false);
rawX = 0f;
break;
case MotionEvent.ACTION_MOVE:
if (Math.abs(rawX - event.getRawX()) > mTouchSlop)
v.getParent().requestDisallowInterceptTouchEvent(true);
break;
}
return false;
}
});
HAdapter adapter1 = new HAdapter(arryNew);
listview1.setAdapter(adapter1);
}
@Override
public void onContentChanged() {
super.onContentChanged();
mImage = (ImageViewTouch) findViewById(R.id.image);
mImage.setDisplayType(DisplayType.FIT_IF_BIGGER);
mImage.setSingleTapListener(
new OnImageViewTouchSingleTapListener() {
@Override
public void onSingleTapConfirmed() {
Log.d(LOG_TAG, "onSingleTapConfirmed");
}
}
);
mImage.setDoubleTapListener(
new OnImageViewTouchDoubleTapListener() {
@Override
public void onDoubleTap() {
Log.d(LOG_TAG, "onDoubleTap");
}
}
);
mImage.setOnDrawableChangedListener(
new OnDrawableChangeListener() {
@Override
public void onDrawableChanged(Drawable drawable) {
Log.i(LOG_TAG, "onBitmapChanged: " + drawable);
}
}
);
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
}
Matrix imageMatrix;
public void selectRandomImage(Integer arryImg) {
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), arryImg);
final DisplayMetrics metrics = getResources().getDisplayMetrics();
int size = (int) (Math.min(metrics.widthPixels, metrics.heightPixels) / 0.55);
if (null != bitmap) {
Log.d(LOG_TAG, "screen size: " + metrics.widthPixels + "x" + metrics.heightPixels);
Log.d(LOG_TAG, "bitmap size: " + bitmap.getWidth() + "x" + bitmap.getHeight());
mImage.setOnDrawableChangedListener(
new OnDrawableChangeListener() {
@Override
public void onDrawableChanged(final Drawable drawable) {
Log.v(LOG_TAG, "image scale: " + mImage.getScale() + "/" + mImage.getMinScale());
Log.v(LOG_TAG, "scale type: " + mImage.getDisplayType() + "/" + mImage.getScaleType());
}
}
);
mImage.setImageBitmap(bitmap, null, -1, -1);
} else {
Toast.makeText(this, "Failed to load the image", Toast.LENGTH_LONG).show();
}
}
private class HAdapter extends BaseAdapter {
ArrayList<ImageListModel> galleryitems = new ArrayList<ImageListModel>();
public HAdapter(ArrayList<ImageListModel> arryNew) {
super();
this.galleryitems = arryNew;
}
public int getCount() {
return galleryitems.size();
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
public View getView(final int position, View convertView,
ViewGroup parent) {
View retval = LayoutInflater.from(parent.getContext()).inflate(R.layout.custom_zoom_items, null);
ImageView image = (ImageView) retval.findViewById(R.id.imgItem);
Picasso.with(ImageZoomActivity.this).load(galleryitems.get(position).getThumb())
.placeholder(R.drawable.appicon).into(image);
//image.setImageResource(galleryitems.get(position));
//Picasso.with(getApplicationContext()).load(galleryitems.get(position)).placeholder(R.drawable.appicon).into(image);
retval.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// mImage.setImageResource(arryNew.get(position));
Picasso.with(ImageZoomActivity.this).load(galleryitems.get(position).getJpg())
.placeholder(R.drawable.appicon).into(mImage);
}
});
return retval;
}
};
}
<强> ImageListModel
import java.io.Serializable;
@SuppressWarnings("serial")
public class ImageListModel implements Serializable{
String thumb,jpg;
public String getThumb() {
return thumb;
}
public void setThumb(String thumb) {
this.thumb = thumb;
}
public String getJpg() {
return jpg;
}
public void setJpg(String jpg) {
this.jpg = jpg;
}
}
并在您想要缩放的地方使用此类